#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
#include<assert.h>
int  my_stren(const char *p)
{
	
	int count = 0;
	assert(p);
	while (*p++ != '\0')
	{
		count++;
	}
	return count;
}
int main()
{
	char arr[] = "abcdef";
	printf("%d",my_stren(arr));
	return 0;
}